Oil-furnace.



Patented 5 3i 13, 1908.

2 sasETasnBnT 1.

E. A: BARNES.

OIL IE'UBNACE.

APPLIOATIQII rxmm 113.19, 1006.

Witnzsses:

. v Inventor; Edward ABar'nes,

- aqtty E. A. BARNES.

OIL FURNACE.

APPLICATION FILED 133.19, 1906.

Patented 0011. 13,1908.

2 SHEETS-SHEET 2 Witnessesi Wzz/W I o ttly EDWARD A. BARNES, OF FGRT WAYNE, INDIANA, ,ASSIGNOR T0 GENERAL ELl1lCTRI'OGOM-- I PANY, A CORPORATION or NEW YORK. j

OIL-FURNACE.

To all whom it may concern: I I

Be it knownthat I, EDWARD A. BAnNEs, a citizen of the United States, residin at Fort Wayne, county of :Allen, State of ndiana,

have invented certain new and useful Ima suitable burner or fire-box.

The invention consists in an improved construction of the furnace by-means of which a whirling or rotating flame is generated at the bottom of the firechamber and follows a spiral or helical course around the crucible or pot, and returns over the top of the crucible to the exit flue, whereby a far more even and uniform heating effect is produced, and considerable economy of fuel and time is effected.

In the accom anying drawin s, illustrating one of the embodiments of t e invention, Figure 1 is a plan view of a furnace; Fig. 2 is a front elevation of the same, partly in sec: tion and Fig. 3 is a cross section of the same.

In Figs. 1 and 2 the furnace is shown as provide with two holes for the pots or crucibles 1, but it is evident that any number of holes may be provided, each one having a chamber 2, preferably circular in horizontal cross section, formed by thick walls 3 of brick or other material, and provided with two or more lids or covers 4. The 0t is preferably raised above the floor of t he chamber by suitable supports 5, Fi 3.

Along the front of t e furnace runsan air pipe 6 throu h which air under pressure is.

supplied to t e burner nozzles 7, which extend through the walls of the furnace into the chambers. Adjacent to the main air pipe, in which the pressure is preferably about 6 to 8 ounces to the square inch, is an auxiliary air pipe 8 in which the pressure is preferably about twenty pounds. A third pipe 9 supplies liquid fuel, such as oil,-under a pressure, preferably of about thirty pounds. Branch pipes 10 and 11 run from the small air pipe and the oil pliipe respectively to a mixing chamber 12, the ow of fluid through each pifpe being controlled by a suitable valve 13, w ose spindle 14 rises above the floor or grating 15 coveringjthe brick-walled trench 16 in which the pipes are laid. The spindle Specification of Letters Patent. Application filed February 1c, 1906. Serial No. 301,805.

17 of .thevalve 18 in thezrnain'airpipe also; rises above this floor, andall the spindles v have suitable handwheels 19 for operating I 7 them. I cause the burner nozzle 7 to enter the,

Patented oer. 13, 1908.

chamber 2 on a tangent to one side thereof,

as clearly shown in Fig. 1, and in-additionto N this, I rovide the walls of the chafnbr'with a s ira or helical duct or channel 20 which rna res preferably about one and a half turns and terminates below the level of the mouth f 21 of the flue 22 which leads to the main horizontalfiue 23 that runs to the stack (not' l The nozzle 7 communicates with 1 shown). the lower endbf the channel 20. The result of this construction is to cause the stream of 'j column of burning gasesfrom the nozzle to revolve or whirl around the inside the lower portion of the chamber and hug the channel or duct. The whirling flame leaves the channel or duct adj acent' the bottom of the pot and Wm s itself as clogaly as possible around it whl e passingupward in the annular space between the 0t and the smooth or unchanneled wall of t e chamber, giving an almost perfectly uniform heat. After the top of the crucible has been reached, the flame continues to yrate around and then laps over the top 0 the crucible, sweeping downward to the flue 22 and thus tending by its revcrberatory action to heat from the top as well as from the bottom. It is found in practice that this construction so directs the flame asto avoid wasteful heating of the refractory lining of the furnace and efiectively heats the crucible by generatin a whirlin flame at the bottom ofthe fire c iamber an concentrating said flame around the entire, exposed surface of the crucible, thus efiecting a decided economy of time and fuel'over furnaces hitherto used. Every. heat unit that is expended in heating and rendering incandescent the walls of a furnace of this sort means loss in efficiency, except as to the which causes the rising gases to help dis-. tribute the rotating flame and to' counteract reverberatory action below the level of the exit opening.

I esire to have it understood that the appa- 110 heat applied. at the bottom of the chamber f In accordance with the provisions of the'105 I V ratus shown is only illustrative, and that the of a cylindrical chamber, an exit flue leading invention can be carried out by other means. What I claim as new and desire to secure by Letters Patent of the United States, is:

1. In a melting furnace, the combination of. a cylindrical fire chamber, an exit flue leading from the upper portion of the chamber, af helical duct or .chan'nelin the inner wallof the lower portion of the chamber which terminates below the opening of the exit flue, the wall above the end of the duct being smooth or unchanneled, and a burnernozzle which discharges into the beginning of the duct to generate a whirling or rotating flame at the bottom of the fire chamber.

2. In a crucible furnace having an exit flue, the combination of a chamber for the crucible which affords free passage for the flame around it and over its top to the exit flue, means which su ports the bottom of the crucible above the floor of the chamber, a helical channel or duct inthe lower portion of the wall of the chamber which terminates adjacent the bottom of the crucible and delivers the flame in a whirling column about i said crucible, and a burner nozzle which disfrom the chamber at a point below its top to bend the flame down over the top of the crucible, a helical channel in the lower portion of the wall of thcchamber which terminates below the exit flue, and a burner nozzle which discharges tangentially into the beginning of the channel to generate a whirling flame at the bottom of the chamber.

4. In a crucible furnace, the combination of a cylindrical chamber, a radially extending exit flue in the chamber wall located below its top to bend the flame down over the top of the crucible, a support which holds the bottom of the crucible above the floor of the chamber, a helical channel in the inner wall of the chamber extending from a point ad jacent the floor to a point adjacent the top of the support, and a burner nozzle discharging into the lower end of the channel to generate a whirling flame at the bottom of the cham ber.

In witness. whereof, I have hereunto set my hand this fifteenth day of February,

EDWARD A. BARNES. Witnesses: I

L. S. NoLD, E. F. DALMAN. 

